Experimental study of the structure of chalcogenide glassy semiconductors in three-component systems of Ge-As-Se and As-Sb-Se by means of NQR and EPR spectroscopy

TL;DR

This study uses NQR and EPR spectroscopy to analyze the atomic structure and coordination in Ge-As-Se and As-Sb-Se chalcogenide glasses, revealing structural transitions and ordering in these materials.

Contribution

It provides new insights into the local atomic coordination and structural transitions in three-component chalcogenide glasses using spectroscopic methods.

Findings

Structural transition from 2D to 3D at r=2.45 in Ge-As-Se

Identification of medium and long-range order in glasses

Atomic coordination details from NQR and EPR data

Abstract

The structure of chalcogenide glassy semiconductors in three-component systems of Ge-As-Se and As-Sb-Se has been studied by means of both NQR and EPR spectroscopy. Investigation of mutual local coordination of atoms has been performed. The results are presented for various ways of combining structural units to provide medium and long-range chemical order of chalcogenide glasses. It appears that for the Ge-As-Se system the structural transition from a two-dimensional to three-dimensional structure occurs at r = 2.45.